Which item is an indication of credibility under the IMA's Statement of Ethical Professional Practice?

This question: $1$ poin

A$.$ Abstain from engaging in or supporting any activity that might discredit the profession.

B$.$ Disclose delays or deficiencies in information, timeliness, processing, or internal controls in conformance with organization policy an

C$.$ Maintain an appropriate level of professional expertise by continually developing knowledge and skills.

D$.$ Refrain from using confidential information for unethical or illegal advantage.